isoseismal

isoseismal

An isoseismal map shows areas of equal earthquake intensity.

Definition

  1. Adjective:

    • Relating to equal seismic intensity: "isoseismal" describes lines or areas on a map that connect points of equal earthquake intensity. It is used in geology and seismology to analyze the distribution of shaking during an earthquake.

  2. Noun:

    • An isoseismal line: "isoseismal" can also refer to a specific line on a map that joins points of equal earthquake intensity.
Usage Examples

  • Adjective:

    • The isoseismal map showed that the earthquake's effects were strongest near the epicenter. (The map displayed lines of equal seismic intensity.)
    • Seismologists drew isoseismal contours to study the earthquake's impact. (They created lines connecting points of equal shaking.)

  • Noun:

    • The isoseismal for intensity VII passed through the city center. (The line of equal intensity VII crossed the urban area.)
    • By analyzing the isoseismals, researchers determined the earthquake's magnitude. (By studying these lines, they estimated the quake's strength.)
Advanced Usage

  • "isoseismal interval": the numerical difference in intensity between adjacent isoseismal lines on a map.

    • The isoseismal interval on this chart is one unit on the Mercalli scale. (The difference in intensity between lines is one scale step.)

  • "isoseismal pattern": the overall arrangement of isoseismal lines, which can indicate the direction of fault rupture.

    • The elliptical isoseismal pattern suggested a directional fault rupture. (The shape of the lines pointed to the rupture's orientation.)
Variants and Related Words

  • Isoseismic (adj): a less common synonym for "isoseismal", meaning the same thing.

    • The isoseismic lines were drawn after the earthquake. (Lines of equal intensity were mapped.)

  • Isoseism (n): a point of equal earthquake intensity on a map.

    • Each isoseism on the map represents a location with the same shaking level. (Every marked point has identical intensity.)
Synonyms
  • Equal-intensity line: a line connecting points of the same seismic intensity.
  • Contour line of intensity: a cartographic term for lines of equal value, here applied to earthquake shaking.
Related Idioms
  • (None common; "isoseismal" is a technical term and does not appear in idiomatic expressions.)